EdgeInsets class

An immutable set of offsets in each of the four cardinal directions.

Typically used for an offset from each of the four sides of a box. For example, the padding inside a box can be represented using this class.

The EdgeInsets class specifies offsets in terms of visual edges, left, top, right, and bottom. These values are not affected by the TextDirection. To support both left-to-right and right-to-left layouts, consider using EdgeInsetsDirectional, which is expressed in terms of start, top, end, and bottom, where start and end are resolved in terms of a TextDirection (typically obtained from the ambient Directionality).

Here are some examples of how to create EdgeInsets instances:

Typical eight-pixel margin on all sides:

const EdgeInsets.all(8.0)

Eight pixel margin above and below, no horizontal margins:

const EdgeInsets.symmetric(vertical: 8.0)

Left margin indent of 40 pixels:

const EdgeInsets.only(left: 40.0)

Constructors

EdgeInsets.all(double value): Creates insets where all the offsets are value. [...]
const
EdgeInsets.fromLTRB(double left, double top, double right, double bottom): Creates insets from offsets from the left, top, right, and bottom.
const
EdgeInsets.fromWindowPadding(WindowPadding padding, double devicePixelRatio): Creates insets that match the given window padding. [...]
EdgeInsets.only({double left: 0.0, double top: 0.0, double right: 0.0, double bottom: 0.0 }): Creates insets with only the given values non-zero. [...]
const
EdgeInsets.symmetric({double vertical: 0.0, double horizontal: 0.0 }): Creates insets with symmetrical vertical and horizontal offsets. [...]
const

Properties

bottom → double: The offset from the bottom.
final
bottomLeft → Offset: An Offset describing the vector from the bottom left of a rectangle to the bottom left of that rectangle inset by this object.
read-only
bottomRight → Offset: An Offset describing the vector from the bottom right of a rectangle to the bottom right of that rectangle inset by this object.
read-only
flipped → EdgeInsets: An EdgeInsets with top and bottom as well as left and right flipped.
read-only, override
left → double: The offset from the left.
final
right → double: The offset from the right.
final
top → double: The offset from the top.
final
topLeft → Offset: An Offset describing the vector from the top left of a rectangle to the top left of that rectangle inset by this object.
read-only
topRight → Offset: An Offset describing the vector from the top right of a rectangle to the top right of that rectangle inset by this object.
read-only
collapsedSize → Size: The size that this EdgeInsets would occupy with an empty interior.
read-only, inherited
hashCode → int: The hash code for this object. [...]
read-only, inherited
horizontal → double: The total offset in the horizontal direction.
read-only, inherited
isNonNegative → bool: Whether every dimension is non-negative.
read-only, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited
vertical → double: The total offset in the vertical direction.
read-only, inherited

Methods

add(EdgeInsetsGeometry other) → EdgeInsetsGeometry: Returns the sum of two EdgeInsetsGeometry objects. [...]
override
copyWith({double left, double top, double right, double bottom }) → EdgeInsets: Creates a copy of this EdgeInsets but with the given fields replaced with the new values.
deflateRect(Rect rect) → Rect: Returns a new rect that is smaller than the given rect in each direction by the amount of inset in each direction. Specifically, the left edge of the rect is moved right by left, the top edge of the rect is moved down by top, the right edge of the rect is moved left by right, and the bottom edge of the rect is moved up by bottom. [...]
inflateRect(Rect rect) → Rect: Returns a new rect that is bigger than the given rect in each direction by the amount of inset in each direction. Specifically, the left edge of the rect is moved left by left, the top edge of the rect is moved up by top, the right edge of the rect is moved right by right, and the bottom edge of the rect is moved down by bottom. [...]
resolve(TextDirection direction) → EdgeInsets: Convert this instance into an EdgeInsets, which uses literal coordinates (i.e. the left coordinate being explicitly a distance from the left, and the right coordinate being explicitly a distance from the right). [...]
override
subtract(EdgeInsetsGeometry other) → EdgeInsetsGeometry: Returns the difference between two EdgeInsetsGeometry objects. [...]
override
along(Axis axis) → double: The total offset in the given direction.
inherited
deflateSize(Size size) → Size: Returns a new size that is smaller than the given size by the amount of inset in the horizontal and vertical directions. [...]
inherited
inflateSize(Size size) → Size: Returns a new size that is bigger than the given size by the amount of inset in the horizontal and vertical directions. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed. [...]
inherited
toString() → String: Returns a string representation of this object.
inherited

Operators

operator %(double other) → EdgeInsets: Computes the remainder in each dimension by the given factor.
override
operator *(double other) → EdgeInsets: Scales the EdgeInsets in each dimension by the given factor.
override
operator +(EdgeInsets other) → EdgeInsets: Returns the sum of two EdgeInsets.
operator -(EdgeInsets other) → EdgeInsets: Returns the difference between two EdgeInsets.
operator /(double other) → EdgeInsets: Divides the EdgeInsets in each dimension by the given factor.
override
operator unary-() → EdgeInsets: Returns the EdgeInsets object with each dimension negated. [...]
override
operator ~/(double other) → EdgeInsets: Integer divides the EdgeInsets in each dimension by the given factor.
override
operator ==(dynamic other) → bool: The equality operator. [...]
inherited

Static Methods

lerp(EdgeInsets a, EdgeInsets b, double t) → EdgeInsets: Linearly interpolate between two EdgeInsets. [...]
override

Constants

zero → const EdgeInsets: An EdgeInsets with zero offsets in each direction.
const EdgeInsets.only()

painting library